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The Experts In Natural Stone Installation
Our company’s heritage dates back more than 50 years
and, as a global manufacturer of high performance speciality
building materials, ARDEX has remained at the forefront of
the UK tiling and flooring industries.
Operating across 50 sites worldwide, we are a premium
supplier of products for subfloor preparation, and the
installation and finishing of natural stone. ARDEX products
have been specified on many prestigious projects, from the
world’s largest shopping mall in Dubai, to London’s most
iconic hotel, The Savoy.
As well as providing RIBA approved CPD seminars,
which allow natural stone floor and wall tiles to be specified
with confidence, ARDEX are active members of The Stone
Federation, The Tile Association and the British Adhesives
and Sealants Association (BASA), and strive to promote
professionalism, technical standards and best practice
within the tiling industry.
ARDEX manufacture products you can trust; all of our
products are produced in accordance with ISO 14001
and ISO 9001.
The ExpertsIn Natural Stone Installation
When specifying ARDEX you can rely on our expert team
for ongoing support at every stage of the process, from
rapid response to specification writing, to installation visits
and on-site testing. National Building Specification clauses
provide best practice, guidance and support for your tiling
specifications, and we regularly partner with complementary
product manufacturers to provide project warranties.
Our purpose built training academy enables us to bring
all parties involved in an ARDEX specification together,
from the client through to the main or sub-contractors,
ensuring total confidence in the specification and subsequent
on-site application.
For the latest and most up to date information and advice,
you can visit the ARDEX CPD ACADEMY at:
www.ardexcpdacademy.com
The academy allows you to earn CPD points by taking
one of our RIBA approved CPD seminars online, including
‘Specifying Natural Stone Tiling with Confidence’. Technical
guidance, product information and project case studies are
also available to download, making the ARDEX CPD Academy
an essential tool in the specification process.
Specification Support At Every Stage
A Perfect Finish Every TimeWhen correctly specified and installed natural stone will
create a visually stunning and durable statement, and it is
this combination of beauty and durability that has inspired
designers and architects and made natural stone finishes
an enduring choice over the centuries.
Natural stones such as granite, marble and limestone
are naturally durable materials that will last a lifetime
but, like any product, when not installed correctly may
cause a number of problems that will negatively affect
the design and vision of the installation.
A smooth, level base is essential in achieving a perfect tiling
finish, and ARDEX are the experts in subfloor preparation.
Unsightly staining is frequently caused when moisture from
traditional tile adhesives and grouts migrates into the stone,
dissolving existing materials such as iron oxides or organic
deposits, which can discolour the face or edges of natural
stone tiles.
ARDEX have developed a system of products specifically
designed to eliminate these problems, ensuring risk free
installation and a perfect finish every time.
ARDEX Natural Stone products, incorporating unique
‘RAPIDRY FORMULA’ technology, have been developed
to provide practical solutions, with the mix water literally
‘locked’ within the mortar, virtually eliminating the risk of
water staining, curling and warping in moisture sensitive
natural stone.
Another key feature is rapid, controlled drying and hardening,
allowing natural stone tiles to be walked on and grouted in
the shortest possible time.
ARDEX Natural Stone products:
n Ensure a smooth, level base prior to fixing natural stone
n Allow the fixing and grouting of moisture sensitive natural
stone that is prone to water staining, curling or warping
n Enable natural stone floors to be walked on in the
shortest time possible
n Offer a complete project solution, including screeding,
levelling and smoothing, fixing, grouting and silicones
n Can be used to fix uncalibrated natural stone
n Ensure solid bed fixing is achieved
ARDEX
‘RAPIDRY FORMULA’
TECHNOLOGY
Eliminating Moisture ProblemsThe main problems associated with natural stone tiles are discolouration and staining, and these typically occur during the
bedding and grouting process. Most of these problems arise when moisture from traditional tile adhesives and grouts migrates
into the stone, creating visible discolouration on the face or edges of the tile.
Water Staining
Some forms of discolouration are often not uniform,
which can mean that the appearance of the installed
tiles differs noticeably from an unfixed tile.
ARDEX RAPIDRY products literally lock the mix water
into the mortar, virtually eliminating water staining.
Blob Fixing
Differential discolouration of natural stone tiles,
due to water absorption, can arise when the tiles have
not been solidly bedded. This effect is often the result
of a fixing technique known as blob fixing, which can
lead to the blobs being visible through the tile.
ARDEX pourable and semi-pourable Natural Stone
Tile Adhesives ensure solid bed fixing is easily achieved,
without the need to butter the back of the tile.
Curling and Warping
The effects of moisture can also cause curling and warping
in thin natural stone tiles. Certain large format, resin-based
agglomerated natural stone tiles are particularly prone to this
effect, as the backs of the tiles are wetted by moisture from
the adhesive bed. In some extreme cases, especially with
‘green marble’, warping can occur within minutes. Advice in
BS 5385-5 advises the use of quick drying adhesives to avoid
this, and the ARDEX range of RAPIDRY Natural Stone Tile
Adhesives provides a solution to this problem.
Picture Framing
Natural stone tiles that are particularly porous might
also suffer from water staining to the edges of the tile.
This is caused by the water from the grout penetrating
into the edge and face of the tile, and is commonly known
as ‘picture framing’. This effect can be minimised with the
use of ARDEX MG Rapid Drying Marble and Natural Stone
Tile Grout.
Natural stone, when correctly selected and installed,
can enhance the overall look and value of an installation.
The Stone Federation is the official trade association of the
natural stone industry, and is able to provide expert advice
on all aspects of the industry, from technical standards,
to advice and guidance in sourcing appropriate materials.
As stone is a naturally occurring product, it’s best to ensure
that sufficient stone is specified from one batch, and that
the tiles are mixed so that shades are blended effectively.
Some natural stone tiles are also packed wet, so will need
to dry out prior to fixing.
It’s important to check that the substrate to be tiled is
dimensionally stable and able to support the weight of the
tiling. For wall tiling, the ideal substrate is render, concrete
or concrete blockwork, for other backgrounds the following
guidance is given to both tile and adhesive weight limits:
n The maximum weight of tiling which can be supported
by a dry, well-adhered gypsum plaster background is
20kg/m².
n The weight of tiling direct to a plasterboard background
should not exceed 32kg/m².
Installation should follow the guidance provided in BS 5385
and Code of Practice BS 8000 -11:2011.
Best Practice ConsiderationsPrior To Fixing Natural Stone
Natural Stone Specification Diagrams
ARDEX MG Natural Stone Tile Grout
ARDEX S 27 or ARDEX S 28 Natural Stone Tile Adhesive
Heated Sand/Cement Screed*
ARDEX MG Natural Stone Tile Grout
ARDEX S 27 or ARDEX S 28 Natural Stone Tile Adhesive
ARDEX K 15 HB Levelling and Smoothing Compound
ARDEX MG Natural Stone Tile Grout
ARDEX S 27 or ARDEX S 28 Natural Stone Tile Adhesive
ARDEX DS 20 Decoupling Mat*
ARDEX AF 200 Matting Bonding Adhesive
Suitable grade and thickness of plywood in accordance with BS 5385-3: 2007
Wooden Floor
TILING ONTO DRY INTERNAL WALLS
ARDEX MG Natural Stone Tile Grout
ARDEX S 27 Natural Stone Tile Adhesive
Internal Wall
TILING ONTO A HEATED SCREED
TILING ONTO AN UNEVEN SUBFLOOR
TILING ONTO A TIMBER SUBFLOOR
*For advice on when to specify a decoupling mat, please contact the ARDEX Technical team.*For advice on when to specify a decoupling mat, please contact the ARDEX Technical team.
ARDEX are the experts in subfloor preparation, and to achieve the surface regularity demanded by BS 5385, it’s important, particularly
with uncalibrated stone, to ensure that the subfloor and fixing products are designed for the job in hand. ARDEX offer a total system
solution for natural stone installation, including Floor Screeds, Levelling and Smoothing Compounds, Tile Adhesives, Tile Grouts and
Silicones.
ScreedsARDEX offer specialist fast track solutions for screeding, with rapid drying and hardening products.
Rapid Repair MortarsARDEX Rapid Repair Mortars enable fast track repairs to be carried out to small internal or external areas like damaged screeds
or concrete steps.
ARDEX ARDURAPID A 45 - Rapid Drying & Hardening Internal Repair Mortar
Ideal for the rapid repair of small internal areas e.g. concrete steps. Can receive natural stone tiles after 1½ hours regardless of thickness, and is slump free.
ARDEX A 46 - Rapid Setting & Hardening External Repair Mortar
Ideal for the rapid repair of small external areas e.g. concrete steps. The rapid hardening properties of ARDEX A 46 mean that it can receive natural stone after 2-3 hours.
EXTERIOR USE
ARDEX A 35 MIX - Rapid Drying Pre-Blended Screeding & Screed Repair Mortar
Unique pre-blended screed repair mortar. Can be walked on after 3 hours and tiled 24 hours after application, regardless of thickness.
ARDEX A 38 - Rapid Hardening and Drying Cement for Floor Screeds
Rapid hardening screed for internal and external use. Receives natural stone tiles directly after only 4 hours for bonded, unbonded and floating screeds.
PUMPABLE EXTERIOR USE
Levelling & Smoothing Compounds A smooth, level base is essential in achieving the perfect tiling finish, and ARDEX Levelling and Smoothing Compounds are an
ideal, cost effective way to achieve this. For larger projects, many compounds can be pumped at a rate of 300-400m² per hour.
ARDEX K 15-HB - High Build Rapid Drying Subfloor Levelling & Smoothing Compound
Creates a smooth and level finish prior to fixing natural stone tiles with the appropriate ARDEX Tile Adhesive. Walkable in 2 hours and, regardless of thickness, natural stone tiles can be fixed after 4 hours. PUMPABLE
ARDEX K 301 - Exterior Self-Smoothing Levelling and Resurfacing Compound
Ideal for levelling large external areas of uneven or damaged concrete. Walkable in 2-3 hours and natural stone tiles can be fixed after 24 hours.
PUMPABLE EXTERIOR USE
ARDEX AF 200 - Matting Bonding Adhesive
Instantly bonds matting systems to the floor, eliminating curling and allowing tiling to commence immediately.
ARDEX DS 20 - Decoupling Mat
Decoupling and Matting Bonding Adhesive ARDEX provide a solution for decoupling domestic and commercial floors.
Decoupling fleece that minimises tension between the subfloor and natural stone tile. Bridges static cracks up to 3mm and minimises build height.
Advanced Products For Natural Stone
Grout Selection
Specifying tile grout is the final part of the installation process, and ARDEX Tile
Grouts are available in a wide range of colours that complement any project.
ARDEX Tile Grouts retain their colour integrity, and through advanced production
processes, high quality raw materials and effective control systems, provide
excellent colour consistency across the range.
The ARDEX Tile Grout Colour Selector can assist in colour specifications and is
available to order by calling 01440 714939.
ARDEX-FLEX FS - Flexible Tile Grout with Built-In Admix
Water and dirt repellent flexible tile grout for joints up to 4mm wide. For use in internal and external locations, including swimming pools. Available in a range of 32 colours for non-moisture sensitive natural stones.
ARDEX MG - Rapid Drying Marble and Natural Stone Tile Grout
Virtually eliminates the risk of water staining to the edges of moisture sensitive natural stones. For internal use on joint widths up to 8mm, ARDEX MG can be trafficked 90 minutes after application. Available in Light Grey, Dark Grey, White, Limestone and Sandstone.
ARDEX-FLEX FL - Rapid Setting & Hardening Flexible Tile Grout with Built-In Admix
Water and dirt repellent flexible tile grout for joints from 3mm to 15mm wide. Can be trafficked 90 minutes after application. For use in internal and external locations, including swimming pools. Available in a range of 32 colours for non-moisture sensitive natural stones.
EXTERIOR USE
EXTERIOR USE
SiliconesARDEX have developed a range of silicones to work with natural stone for sealing wall and floor joints.
ARDEX ST - Natural Stone Silicone
An interior and exterior grade silicone, specially designed to work with natural stone and to virtually eliminate the risk of moisture staining around tile edges. ARDEX ST contains fungicides to combat mould growth, and is weather resistant and UV stable. Available in Transparent and 6 colours that complement the ARDEX Tile Grout range.
EXTERIOR USE
ARDEX S 20 - Flexible Rapid Hardening & Drying Natural Stone Tile Adhesive
For bed thicknesses from 5mm to 20mm. ARDEX S 20 virtually eliminates the risk of water staining and is ideal for uncalibrated natural stone. Can be trafficked and grouted 3 hours after fixing. ARDEX S 20 White is ideal for fixing translucent marble and light coloured natural stones. GREY WHITE
ARDEX X 7001 - MICROTEC Rapid Drying Pourable Floor Tile Adhesive
Pourable adhesive ideal for fixing large format natural stone floor tiles. Achieves solid bed fixing without the need to butter the back of the tile, and tiles can be trafficked and grouted 2 hours after fixing.
ARDEX X 32 - Rapid Hardening & Rapid Drying Natural Stone Tile Adhesive
For bed thicknesses from 3mm to 30mm. ARDEX X 32 can be used externally and is ideal for fixing uncalibrated natural stone. Reduces the risk of water staining and can be grouted and trafficked just 3 hours after fixing. EXTERIOR USE
ARDEX S 28 - MICROTEC Rapid Hardening and Rapid Drying Semi-Pourable Natural Stone Floor Tile Adhesive
Reduces the risk of water staining, curling and warping in moisture sensitive natural stone tiles. Semi-pourable consistency is ideal for solid bed fixing large format natural stone floor tiles. ARDEX 28 W is ideal for fixing translucent marble and light coloured natural stones.
Natural Stone Tile Adhesives ARDEX Natural Stone Tile Adhesives incorporate ARDEX RAPIDRY FORMULA Technology which reduces the risk of water
staining, curling and warping in moisture sensitive natural stone.
ARDEX S 27 - MICROTEC Rapid Hardening and Rapid Drying Natural Stone Wall and Floor Tile Adhesive
Reduces the risk of water staining, curling and warping in moisture sensitive natural stone. Can be trafficked and grouted 2 hours after fixing, regardless of bed thickness. 30 minute open time. ARDEX 27 W is ideal for fixing translucent marble and light coloured natural stone.
ARDEX also manufacture a range of adhesives suitable for non-moisture sensitive natural stone. Please contact the ARDEX technical team for further information.
Advanced Products For Natural Stone
ARDEX UK Limited, Homefield Road, Haverhill, Suffolk, CB9 8QP. Tel: 01440 714939 Fax: 01440 716640
www.ardex.co.uk www.ardexcpdacademy.com e-mail: [email protected]